CAMERA LINK FC1600FCL, Инструкция по эксплуатации

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Example of drive circuit for Vinit1 input circuit
75 Ω
6
Vinit1 IN
VC C
3.3V
4.7k
47p
3.3V
10k
100 Ω
NORMAL
INVERTED
3.9 ZD
* The Vinit signal should not include unnecessary
noise components such as chattering.
●
Polarity reversal of Vinit2 input
The input polarity of the trigger signal (Vinit2) to be applied via CC1 of Camera Link can be inverted.
Some capture boards may have the polarity of the trigger signal input from CC1 that is fixed to positive logic (L level at
normal/H level at active), which is not compatible with the trigger signal of negative logic input (factory preset polarity
of this equipment). In this case, the input polarity of the trigger signal (Vinit2) via CC1 can be inverted to change from
negative to positive logic by the setting of the camera.
→
Refer to “(6-3) How to set operation mode” for the specific setting method.
(Note) The setting of the polarity reversal is valid only for Vinit2. The input polarity of Vinit1 is always negative logic
regardless of this setting.
(4-3) Input of external synchronous trigger signal(Ext-HD/VD)
● How to input external synchronous trigger signal
When more than one cameras are used in synchronization state, it is necessary to input external synchronous signal
(Ext-HD/VD signal) from user side equipment. When it is needed to synchronize horizontal timing, input HD signal.
Input HD and VD signals to synchronize both horizontal and vertical timings.
(Note) Note that the delay jitter may occur between externally supplied HD signal and HD signal within the camera, when
horizontal operation timing is synchronized by external synchronous signal,
(Note) When in asynchronous mode, only the HD signal is effective as an external sync signal. In that case, VD signal is
neglected. Normally, do not apply VD external sync signal in asynchronous shutter mode.
(Note) It may generate streaky noise in external sync mode(especially in high gain). In that case turn down the gain to the
utmost extent.
●
Recommended external sync signal
HD
VD
Th Tlh
Tlv
※
Tv
Parameter
Scan mode Th Tv Tlh Tlv VD
↓
/ HD
↓
phase error
Normal scan mode 31.23
µ
s ±1 % 1068 × Th 0.1 × Th ±10 % 9 × Th 0 ±1.0
µ
s
Partial scan mode ↑ 534 × Th ↑ ↑ ↑
・
The voltage level of input sync signal is 2 to 5V p-p(signal level range -0.5 to 5V) when connected to HD/VD input of the camera.
[Important]
(Note) Make sure to follow the conditions of “Recommended external sinc signal”. If the signals of incorrect timing or
incorrect level are input, troubles may be caused.
(Note) As the external sync operation and the H-reset operation in the asynchronous shutter mode are conflicting, ensure
to select one out of these two operations. If both operation modes are simultaneously selected, it can not function
well.
74AC04 or
others
Inside of camera
TC74LVX14
(or equivalent)
To internal circuit
Setting of Vinit2 polarity
CC1 (Vinit2) input
Camera
connector
VCC is +5V or +3V
[Example of user circuit]